- n = snprintf(ret->hostname, sizeof ret->hostname,
- "%s%d", X11_UNIX_PATH, displaynum);
+ /*
+ * Mac OS X Leopard uses an innovative X display naming
+ * convention in which the entire display name is the path to
+ * the Unix socket, including the trailing :0 which only
+ * _looks_ like a display number. Heuristically, I think
+ * detecting this by means of a leading slash ought to be
+ * adequate.
+ */
+ if (display[0] == '/') {
+ n = snprintf(ret->hostname, sizeof ret->hostname,
+ "%s", display);
+ } else {
+ n = snprintf(ret->hostname, sizeof ret->hostname,
+ "%s%d", X11_UNIX_PATH, displaynum);
+ }